// Copyright 2008 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#ifndef TORCH_ANALYSIS_UTILITIES_H_
#define TORCH_ANALYSIS_UTILITIES_H_

#include "DataSet.h"
#include "GradientMachine.h"
#include "Criterion.h"
#include "matrix.h"


namespace Torch {

int GetNParams(GradientMachine *machine);
void ClearDerivatives(GradientMachine *machine);
void LoadDirections(char *directions_filename, int n_directions, Mat *directions);
void EvaluateGradient(GradientMachine *machine, Criterion *criterion, DataSet *data, Vec *gradient);
real EvaluateGradientVarianceInDirection(GradientMachine *machine, Criterion *criterion, DataSet *data, Vec *direction, bool is_centered);
void StepInParameterSpace(GradientMachine *machine, Vec *direction, real stepsize);

}
#endif  // TORCH_ANALYSIS_UTILITIES_H_
